Car-truck.



No. 680,56. Patented Aug. I3, Ism. E. s. woonls.

CAR TRUCK.

(Applicgtion med Apr. 22, 1901.)

(No Model.)

f? will Y a i 1| Ill EDXVIN S. WOODS, OF CHICAGO, ILLNOIS.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 680,516, dated August13, 1901.

Application filed April 22, 1901. Serial No. 56,913. (No model.)

T0 all wton it may concern:

Be it known that I, EDWIN S. VOODS, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inCar-Trucks, p

of which the following is a specification.

The present invention relates to that class of car-trucks in which theaxles are adapted to have independent lateral movement in thetruck-frame proper to compensate for irregularities in the track, with aview to lessen or prevent excessive lateral strain upon thewheel-flanges and the consequent wear of 'the same, as well as aliability to fracture.

The object of the present improvement is to provide a simple andefficient connection between the different axles, boxes of the axles,and the side frames ot' the truck, which will permit of the free andindependent vertical as well as lateral movements of the wheels tocompensate for irregularities in the track, and with which the tendencywill be to return the parts after any such movement to a relative andnormal position with relation to each other, all as will hereinaftermore fully appear and be more particularly pointed out in the claims. Iattain such object by the construction and arrangement of partsillustrated in the accompanying drawings, in which- Figure lis afragmentary side elevation of a car-truck embodying the presentimprovement; Fig. 2, an enlarged detail side elevation with parts insection; Fig. 3,- an enlarged central transverse section taken centrallyon Fig. 2.

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, l represents one counterpart half of the sideframe or pedestal of a car-truck provided with the usualdownwardly-opening recess, in which the axle-box 2 is-located, theconstruction being such that the car-axle, with its axle-box, is capableof a free lateral movement within a prescribedrange in addition to theusual vertical movement in said aXle-box-containing recess of the truckframe or pedestal.

2 is the axle-box of any usual construction, guided in the openingtherefor in the truckfrarne and adapted to have the before-describedmovements in the same.

3 is a spring by which the truck or pedestal is yieldingly supported' onthe axle-box. Such spring may be of any usual and preferred form. Thefamiliar spiral form of spring is shown in the drawings for the sake ofillustration and as affording a wide bearing for the ends of the springbest adapted for the perfect operation of the present invention. In thepresent improvement the spring 3 is interposed between the upper surfaceof the axle-box 2 and a spring or bearing 'cap 4, located in a verticalplane above the spring and axle-box, and the said spring is held inposition against lateral displacement by receiving-sockets for the endsthereof, formed by central bosses 5 and annular rims 6 on the aforesaidparts.

7 is a crown-piece secured to the upper or crown portion of theaxle-box-receiving recess of the pedestal and having a separatedvertical relation above the spring or bearingcap 4.

S represents a twin set of bearing-rollers arranged between therespective lower face of the crown-piece 7 and the upper face of thespring or bearing-cap 4 and in a direction longitudinal of the frame orpedestal and adapted to form a frictionless bearing vupon which thebearing-cap 4 can move independent of the crown-piece 7 in a lateralmovement of the car-axle and box with relation to the pedestal. In thepresent improvement the opposed faces of the crown-piece 7 and thespring or bearing-cap 4 are formed with counterpart pairs of curved ordished recesses 9 and 10, adapted to form the tracks or bearing-surfacesfor the twin set of bearing-rollers 8 and individual thereto, as shown,the curved or dished form of such tracks or surfaces being intended inthe present construction to insure a return of the parts to a normal andcentral relation after a lateral movement to one side or the other.

In my preferred construction, as shown in Fig. 3 of the drawings, eachof the curved tracks or recesses 9 and l0 will be separated by a centralstop rib or flange 11 and be provided with end anges or ribs l2, whichare adapted to act as stops at the limit of the nor- IOO p mal lateralmovement of the car-axle and box against the rails and the excessivewear and liability to fracture of said wheel-anges under the heavy loadsusually carried.

With the present improved construction, as shown in the drawings, thetwin set of bearing-rollers 8 are adapted to have bearing entirelywithin a zone of a much less area than that of the bearing or supportingspring 3, and in consequence the liability of a canting of the partsduring actual use is reduced to a minimum and the proper movement of thepart-s insured in a very efficient manner.

Another important advantage resulting from the above-describedarrangement is that the bearing upon the rollers is in a direct manner,and in consequence affords a strong and durable connection of the parts.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination with a car-truck, andl an axle-box, of asupporting-spring, a springbearlng cap, a crown-piece attached to thetruck-frame, and a pair of twin rollers interposed between thebearing-cap and the crownv piece and adapted to afford independentlateral movement to the axle-box, substantially as set forth.

2. The combination with a car-truck, and an axle-box, of asupporting-springa springbearing cap, a crown-piece attached to thetruck-frame, and a pair of twin rollers interposed between thebearing-cap and the crownpiece in a central zone of a less area than thesupporting-spring, and adapted to afford independent lateral movement tothe axle-box, substantially as set forth.

3. The combination with a car-truck, and an axle-box, of asupporting-spring, a springbearing cap, a crown-piece attached to thetruck-frame, and a pair of twinrollers interposed between thebearing-'cap and the crownpiece and adapted to aord independent lateralmovement to the axle-box, the opposed faces of the bearing-cap andcrown-piece bein g formed with curved or dished recesses forming tracksfor the rollers and individual thereto, substantially as set forth.

4. The combination with a car-truck, and an axle-box, of asupporting-spring, a springbearing cap, a crown-piece attached to thetruck-frame, and a pair of twin rollers interposed between thebearing-cap and the crownpiece in a central zone of a less area than thesupporting-spring, the opposed faces of the bearing-cap and crown-piecebeing formed with curved or dished recesses forming tracks for therollers and individual thereto, substantially as set forth.

5. The combination with a car-truck, and an axle-box, of asupporting-spring, a springbearing cap, a crown-piece attached Vto thetruck-fram e, and a pair of twin rollers interposed between thebearing-cap and the crownpiece and adapted to afford independent lateralmovement to the axle-box, the opposed faces of the bearing-'cap andlcrown-piece being formed with curved or dished recesses forming tracksfor the rollers, and having end stop flanges or ribs, substantially asset forth.

6. The combinationwith a car-truck, and an axle-box, ofasupporting-spring, a springbearing cap, a crown-piece attached to thetruck-frame, and a pair of twin rollers interposed between thebearing-cap and the crownpiece in a central zone of a less area'than thesupporting-spring, the opposed Vfaces of the bearing-cap and crown-piecebeing formed with curved or dished recesses forming tracks for therollers and having end stop flanges or ribs, substantially as set forth.

Signed at Chicago, Illinois, this 20th day of April, 1901.

EDWIN S. WOODS.

Witnesses:

ROBERT BUR-Ns, 4HENRY A. Norr.

